Dual circuit power supply
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Recently, when designing a methanol plant, I came across the power supply method for all pumps, whether it should be single circuit, dual circuit or three circuit (emergency backup power supply). What are the general considerations?
Emergency backup power supply and dual circuit each have their own characteristics, which depends on your requirements for on-site working conditions. The key is to control the emergency response to power outages.
Generally, single busbar segmented dual-circuit power supply is used, which has better effect.
Determined according to the load level, if this device belongs to a large chemical enterprise, the company's power supply is generally dual-circuit power supply. When designing the power distribution power supply, dual-circuit power supply is used, and the process electrical equipment is placed on the two-circuit power supply, so that the power supply reliability will be higher.
The methanol plant determines the power supply method according to the load certification of the design institute. Generally, the load of the methanol plant is a secondary load and requires dual-circuit power supply. Some primary loads must be powered by dual power supplies. The design institute for primary load certification will be different. Ours includes fire protection loads, boiler water pumps, instrument power supplies, etc. If you want to know more about which power supply method should be selected, you can refer to the "Design Code for Power Supply and Distribution System".